Why is the Moon always facing the Earth?

This is because the Moon is "tidally locked" by the Earth!

The one on the second floor is the same as it wasn't said.。。。

Similarly, Mercury is being locked by the Sun, and a significant number of the moons of the other planets in the Solar System are also locked on, with only one side facing the central body, just like the Moon.

Principle: If you know the tidal phenomena on the earth, you will find that the tides always go against the direction of the earth's rotation, so that the tides give the earth's rotation a resistance and slow down the earth (this is the reason why the earth's rotation slows down for a long time, you can learn about it if you are interested); In the same way, the Moon was also affected by this force before, and gradually locked in by the Earth during its operation for hundreds of millions of years.

This is called synchronous rotation.

Refers to the phenomenon that a celestial body revolves around another celestial body while also rotating, and its rotation period is the same as the rotation period, and the direction (clockwise direction) is also basically the same (the direction is the same, but it may not be exactly on the same plane).

The more famous is the synchronization of the Moon, the result of which is that the Moon always faces the Earth "head-on". Only about half of the Moon can be seen on Earth (because the rotation is basically uniform, and the revolution is non-uniform, and there is an angle between the orbital plane of the Moon and the equatorial plane of the Earth, about 59% of the Moon can be seen in total from long-term observation on Earth).

Pluto and its moon Pluto rotate synchronously with each other. Astronomers liken them to a pair of dancing partners holding hands across from each other.

This phenomenon is not accidental, not a coincidence of absolute numbers, but the result of long-term tidal gravitational action.

Because the period of the moon's rotation is the same as the period of one revolution around the earth!

I'm coming to you! Refers to any point on earth. The other side of the moon will never be seen anywhere on Earth! For more details, you can take a look at mine below, I hope it will help you! Resources.

Because Chang'e misses her hometown, she always has to be able to see her hometown, the earth.

Reason: Under the long-term action of the Earth's gravitational pull, the Moon's center of mass is no longer the geometric center, but the side close to the Earth, so the gravitational potential energy of the Moon relative to the Earth becomes minimal.

During the rotation of the Moon around the Earth, the center of mass of the Moon is always facing the side of the Earth, just as the Earth ties the Moon with a rope. The same goes for other moons in the solar system, so it's not accidental that the rotation period of a satellite is equal to that of a satellite, but there are intrinsic factors.

For example, first stretch out your left hand, open your palm, remember a dot in the center of your palm, and slowly draw a circle with any finger of your right hand on the left palm with this point as the center, starting below the middle finger of your left palm.